And no one is really shocked by this.
According to Technorati's "State of the Blogosphere Survey" more "hobbyist" bloggers are shunning traditional blogging platforms in favor of microblogging: Twitter, Tumblr, and Facebook updates. (Forbes) Just over half say they update their blogs somewhat or a lot less than they did in years past.
As someone who's been blogging in some capacity for the last half-decade, this doesn't surprise me one bit. Blogging is often thankless work. For every Dooce out there are hundreds of, well, me. I'm giving up blogging yet, but, yeah, it's much easier tweeting 140 character aphorisms than writing a "proper" post. Duh.